Where does “suttupytty” come from?

suttupytty (Finnish) comes from Finnish pytty, from Swedish bytta, from Old Norse bytta — small tub, pail, bucket.

Ancestry of “suttupytty”, step by step

suttupytty traces back through two separate lines of ancestry.

via Finnish pytty

StepLanguageWordMeaning
1Finnishpyttypot; toilet seat; cylinder
2Swedishbyttaa bucket, a bowl
3Old Norsebyttasmall tub, pail, bucket

via Finnish suttu

StepLanguageWordMeaning
1Finnishsuttusmudge
2Finnish-uForms nouns from verbs. Most common with "e"- and...
3Proto-Finnic-uForms nouns from adjectives, nouns
Every word from Old Norse byttaEvery word from Swedish byttaEvery word from Finnish pytty